Underwater vessel noise in a commercial and tourist bay complex in the Mexican Central Pacific

David Alonso Rosales Chapula CHRISTIAN DANIEL ORTEGA ORTIZ Myriam Llamas González ARAMIS OLIVOS ORTIZ ERNESTO TORRES OROZCO Braulio Leon-Lopez Eduardo Romero Vivas (2022, [Artículo])

"Noise generated by ship traffic is increasing around the world. Hence, there is need to effectively evaluate anthropogenic noise levels in marine habitats. In this study, the noise contribution of ships in the Santiago–Manzanillo bay complex, on the Pacific coast of central Mexico, was assessed. The semienclosed bay complex is one of the most important commercial ports in Mexico, and it is an area with high biological richness and tourism demand, including demand by the informal humpback whale watching industry. Bottom-fixed recording systems were deployed at the entrance to the bay, near the commercial port (Manzanillo Bay), and within the tourist area (Santiago Bay). Monthly acoustic records were obtained from September 2015 to August 2016. Boat categories confirmed by visual sightings were associated with their acoustic signals. According to the diagnostic frequency range, vessel noise was classified into noise coming from large ships (50–220 Hz) or from small vessels (290–500 Hz). Large ships were always detected at both stations, while, as expected, small vessels were more common in tourist areas. Vessel noise in the entire area ranged from 130 to 170 dB (RMS re 1 μPa) and was present up to a median of 81.8% of the time throughout the year, with higher prevalence from 1200 to 1600 hours. Marine traffic activities were constant in the area, but frequency content and sound pressure levels were not equally distributed across the bay. Therefore, it is important to consider the possible differential impacts on marine fauna inhabiting the area."

"El ruido generado por el tránsito de embarcaciones ha ido en aumento a nivel mundial, por lo que se requiere evaluar objetivamente los niveles de ruido antropogénico en los hábitats marinos. En este estudio, se evaluó la contribución de las embarcaciones a los niveles de ruido en el complejo de bahías Santiago-Manzanillo, en la costa del Pacífico central mexicano. Este complejo de bahías semicerradas es uno de los puertos comerciales más importantes de México y, a su vez, un área con alta riqueza biológica y demanda turística, incluida la demanda de la industria informal de avistamiento de ballenas jorobadas. Desde septiembre de 2015 hasta agosto de 2016, se obtuvieron registros acústicos mensuales de sistemas de grabación fijos colocados en la entrada a la bahía, cerca del puerto comercial (bahía de Manzanillo) y dentro del área turística (bahía de Santiago). Los barcos avistados durante las grabaciones se asociaron a sus señales acústicas y se agruparon por categoría. De acuerdo con su rango diagnóstico de frecuencia, el ruido de los barcos se clasificó en barcos grandes (50–220 Hz) y pequeños (290–500 Hz). Los barcos grandes siempre se detectaron en ambas estaciones, mientras que, como se esperaba, los barcos pequeños fueron más comunes en las zonas turísticas. El ruido de embarcaciones en toda la zona osciló entre 130 y 170 dB (RMS re 1 μPa) y estuvo presente en una mediana de hasta el 81.8% del tiempo a lo largo del año, con mayor prevalencia entre las 1200 y 1600 horas. Las actividades del tráfico marítimo fueron constantes en el área, pero el contenido de frecuencias y los niveles de presión sonora no se distribuyeron por igual a lo largo de la bahía, por lo que se deben diferenciar los posibles impactos sobre la fauna marina que habita en el área."

ruido de embarcaciones, puerto comercial, puerto turístico, disturbio, ballenas vessel noise, commercial port, tourist port, disturbance, whales BIOLOGÍA Y QUÍMICA CIENCIAS DE LA VIDA BIOLOGÍA ANIMAL (ZOOLOGÍA) ECOLOGÍA ANIMAL ECOLOGÍA ANIMAL

Comparación de la bioacústica de dos especies del género rana (Amphibia: Ranidae) en Honduras

EMMANUEL ORELLANA MURILLO (2023, [Tesis de maestría])

BIOLOGÍA Y QUÍMICA CIENCIAS DE LA VIDA BIOLOGÍA ANIMAL (ZOOLOGÍA) ECOLOGÍA ANIMAL ECOLOGÍA ANIMAL

Dynamic simulation of diploid vs. triploid Pacific oyster (Crassostrea gigas) productive performance in northwestern Mexico

ROBERTO ASCENCIO MICHEL Ana María Ibarra Humphries MARCELO EDUARDO ARANEDA PADILLA GERMAN PONCE DIAZ FRANCISCO JAVIER VERGARA SOLANA (2022, [Artículo])

"The Pacific oyster Crassostrea gigas was introduced in northwestern Mexico for aquaculture purposes. Although its cultivation has been successful, this species has shown high mortalities during summer. To mitigate this problem, producers have resorted to biotechnology (triploidy), whose performance -regarding diploid seedling- depends on site conditions and stocking time. Hence, uncertainty exists on its benefits under real production conditions. This research evaluates triploidy performance by implementing a Dynamic simulation model considering environmental effects (temperature and chlorophyll) on culture production. The dynamic simulation was based on systems theory, dividing the productive system into two sub-models (environmental and biological), including temperature and chlorophyll effects, growth, mortality, and condition index parameterized in the function of the environmental parameters. The dynamic simulation results suggest that implementing triploid culture is advantageous in zones under high stress associated with high temperatura and low productivity; likewise, triploid spat tends to show better performance independently of the site. Nevertheless, performance by ploidy varies depending on the environmental conditions of the sites."

BIOLOGÍA Y QUÍMICA CIENCIAS DE LA VIDA BIOLOGÍA ANIMAL (ZOOLOGÍA) FISIOLOGÍA ANIMAL FISIOLOGÍA ANIMAL

Draft Genome Sequence of Pediococcus pentosaceus Strain PP16CC, Isolated from Oyster Crassostrea corteziensis

JULIO ANTONIO HERNANDEZ GONZALEZ RICARDO VAZQUEZ JUAREZ Jose Manuel Vazquez-Guillen Carlos Rangel Dávalos MARIA CRISTINA RODRIGUEZ PADILLA MAURILIA ROJAS CONTRERAS (2022, [Artículo])

"Pediococcus pentosaceus strain PP16CC comes from the intestine of Crassostrea corteziensis. A 1.82-Mbp draft genome of this strain was assembled using A5-miseq from illumina reads, resulting in 4 contigs and 1,856 predicted protein coding genes. Additionally, 23 proteins belonging to various glycosyl hydrolase families and 6 prophage regions were identified."

Genome Sequence, Pediococcus pentosaceus BIOLOGÍA Y QUÍMICA CIENCIAS DE LA VIDA BIOLOGÍA ANIMAL (ZOOLOGÍA) GENÉTICA ANIMAL GENÉTICA ANIMAL

Riqueza y diversidad de especies de murciélagos (Chiroptera) en Honduras

ANA LUISA PINEL TROCHEZ (2023, [Tesis de maestría])

BIOLOGÍA Y QUÍMICA CIENCIAS DE LA VIDA BIOLOGÍA ANIMAL (ZOOLOGÍA) ECOLOGÍA ANIMAL ECOLOGÍA ANIMAL

Recent advances on research of native prawn Macrobrachium americanum (Decapoda: Palaemonidae) with aquaculture and conservation purposes

Yuneisy Milagro Agüero Fernández MIRIAM VICTORIA MARTIN MANZO MARITZA LOURDES SOBERANES YEPIZ Marcelo Ulises García Guerrero Yuniel Méndez Martínez Luis Hector Hernandez Hernandez Laura S López Greco Edilmar Cortés Jacinto (2022, [Artículo])

"Where good management practices on aquaculture are mandatory. The economic and ecological importance of prawns of the Genus Macrobrachium cause an impact at a global level involving economic, academic and social aspects. Macrobrachium americanum appears as one of the genus species with high nutritional value and an economic demand in the national and international markets, as well as a vital income for fisherman and producers of this species. For researchers, it is a challenge to find solutions to culture and propose conservation measures for M. americanum with emphasis on development, nutrition and reproduction. Although there are scientific studies supporting the economic importance of this species, our knowledge about its cultivation, reproduction and conservation is limited. This paper summarizes the latest studies made in cooperation with M. americanum in research lead by the Centro de Investigaciones Biológicas del Noroeste, Mexico. After several years of continuous research, it is considered that those efforts have produced useful information for the sustainable exploitation, conservation and basic management practices of this species."

Freshwater ecosystem, growth rate, native prawn species, conservation, sustainable fishing BIOLOGÍA Y QUÍMICA CIENCIAS DE LA VIDA BIOLOGÍA ANIMAL (ZOOLOGÍA) ECOLOGÍA ANIMAL ECOLOGÍA ANIMAL

Variabilidad morfológica y morfométrica de dos subespecies de la ardilla arborícola Scirus variegatoides en Honduras

DIANA MELISSA MENCIA BAIDE (2023, [Tesis de maestría])

BIOLOGÍA Y QUÍMICA CIENCIAS DE LA VIDA BIOLOGÍA ANIMAL (ZOOLOGÍA) DESARROLLO ANIMAL DESARROLLO ANIMAL

Gene expression in primary hemocyte culture of the Pacific white shrimp Penaeus vannamei infected with different white spot syndrome virus (WSSV) strains

Delia Patricia Parrilla Taylor REGINA ELIZONDO GONZALEZ Jesús Neftalí Gutiérrez Rivera SILVIA ALEJANDRA GARCIA GASCA NORBERTO VIBANCO PEREZ MA. DE JESUS DURAN AVELAR RICARDO VAZQUEZ JUAREZ (2022, [Artículo])

"Five previously analyzed white spot syndrome virus (WSSV) strains from northwest Mexico,differing in their genome architecture as well as in virulence, were selected (high virulence JP and LG strains;moderate virulence GVE and DIV strains; and low virulence LC10 strain) to evaluate pathogenesis response in vitro. Expression of phagocytosis-activating protein PAP, manganese superoxide dismutase MnSOD and peroxiredoxin PRX, and two genes of immediate-early expression (IE1 and WSSV304) were measured by qPCR in a primary hemocyte cell culture from Penaeus vannamei at 1, 3, 6, 12, and 24 h post-infection (hpi). PAP expression was significantly higher at 1 and 3 hpi, and JP and LC10 strains induced the highest expression. The response of MnSOD was high at 1 hpi, and a significant increase in PRX expression was detected at 3 hpi, probably due to the occurrence of an oxidative burst; expression levels of MnSOD and PRX were significantly higher at 1 and 3 hpi, respectively, induced by the LG strain (high virulence), suggesting an acute response. In general, expression of most immune-related - genes decreased after the initial hours of infection. Expression levels of IE1 and WSSV304 were exceptionally high at 1 hpi in almost all five WSSV analyzed strains,confirming their efficient mechanism for replication and viral fitness. The results of this study do not show an accurate link between the genome size and WSSV virulence of the strains, albeit the strain with the smallest genome showed the highest virulence. All strains induced an early immune response in heterogeneous ways."

Penaeus vannamei, virulence, gene expression, viral fitness, viral pathogenesis, immune response BIOLOGÍA Y QUÍMICA CIENCIAS DE LA VIDA BIOLOGÍA ANIMAL (ZOOLOGÍA) PATOLOGÍA ANIMAL PATOLOGÍA ANIMAL

Hyperiid amphipods from the Gulf of Ulloa and offshore region, Baja California: The possible role of the gelatinous zooplankton as a transport vector into the coastal shelf waters

Bertha Lavaniegos (2020, [Artículo])

Hyperiid amphipod species from the Gulf of Ulloa, Baja California, and the adjacent region (from the shelf break to 200 km offshore) were analyzed to evaluate diversity and abundances. This productive area supports small-scale commercial fisheries, including sand bass (Paralabrax nebulifer), California spiny lobster (Panulirus interruptus), abalones, clams, and others. Strong coastal upwelling events were observed during summer seasons of the period 2002-2008 between Punta Eugenia and Punta Abreojos. The upwelling plumes at Punta Abreojos are transported southward in slope waters bordering the coastal shelf of the Gulf of Ulloa, contributing to the separation of coastal and oceanic regions, and explain differences in amphipod diversity and abundances between both regions. In the offshore region, the most abundant species were Vibilia armata, Lestrigonus schizogeneios, Primno brevidens, and Eupronoe minuta, similar to previous findings in northern regions of Baja California and southern California. However, abundances of these species were lower (10-30 individuals/1000 m3), only reaching 20-50% of abundance levels reported off northern Baja California. In the coastal shelf of the Gulf of Ulloa, amphipods were virtually absent during 2002, 2003 and 2006. However, during 2004 and 2005, abundances of P. brevidens increased (54 and 20 ind/1000 m3, respectively). Moreover, during the late summer of 2007, abundances of L. schizogeneios, P. brevidens, Lycaea nasuta, Lycaea pulex, and Simorhynchotus antennarius increased considerably (261, 39, 31, 68, 416 ind/1000 m3, respectively), indicating occasional utilization of the coastal shelf by pelagic amphipods. Changes in gelatinous populations (medusae, siphonophores, ctenophores, doliolids, and salps) paralleled changes in hyperiid populations, with highest abundances in 2005-2008 in the coastal shelf. Significant correlations of 17 amphipod species with gelatinous taxa, which are often used as host organisms by hyperiid amphipods, suggest that gelatinous presence enhanced hyperiid abundance and promoted the progression of hyperiid amphipods onto the coastal shelf during parts of the 2002-2008 period. © 2020 Bertha E. Lavaniegos. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

abalone, Amphipoda, article, Baja California, clam, clinical article, Ctenophora, Eugenia, female, fishery, human, human experiment, male, medusa, nonhuman, Panulirus interruptus, plume, summer, zooplankton, Amphipoda, animal, California, ecosystem, CIENCIAS FÍSICO MATEMÁTICAS Y CIENCIAS DE LA TIERRA CIENCIAS DE LA TIERRA Y DEL ESPACIO OCEANOGRAFÍA OCEANOGRAFÍA

Una solución de elemento finito para la transferencia de agua en un sistema de drenaje agrícola subterráneo

Heber Saucedo CARLOS FUENTES RUIZ MANUEL ZAVALA TREJO (2002, [Artículo])

Se ha desarrollado una solución de elemento finito de la ecuación bidimensional de Richards, para describir el movimiento del agua en un sistema de drenaje agrícola subterráneo. La solución de elemento finito ha sido parcialmente validada con una solución analítica exacta de la ecuación de Richards para una columna semi-infinita de suelo sujeta a una condición de flujo constante sobre la superficie del suelo, la cual describe la evolución temporal del perfil de humedad sobre el dren mientras la posición del frente de humedecimiento sea menor que la profundidad del dren. La comparación de los perfiles de humedad en un suelo arenoso y otro arcilloso ha permitido seleccionar un solo paso de tiempo numérico para aproximar la solución exacta en ambos suelos con un error relativo máximo menor de 0.25%. La solución de elemento finito ha sido aplicada para describir el funcionamiento hidráulico de un sistema de drenaje instalado en una parcela agrícola de un distrito de riego ubicado en la zona semiárida del noroeste de México, aceptando la presencia de una superficie de filtración en el dren. El suelo de textura esencialmente arcillosa ha sido caracterizado, desde el punto de vista hidrodinámico, a partir de su curva granulométrica y su porosidad, a partir de una prueba de drenaje en la parcela. La conductividad hidráulica a saturación y un valor característico de la presión se estimaron a fin de minimizar los errores entre el hidrograma proporcionado por la solución y el hidrograma observado experimentalmente. El hidrograma teórico proporcionado, por la solución de elemento finito, describe las características matemáticas, como la presencia de un punto máximo, del hidrograma experimental. Las fases de crecimiento y recesión del hidrograma son igualmente bien descritas por la solución. Esto valida el tratamiento de la condición de frontera en el dren como una superficie de filtración. En consecuencia, la solución propuesta puede ser utilizada tanto para la identificación de parámetros del suelo a partir de pruebas de drenaje como para la descripción del funcionamiento hidráulico de un sistema de drenaje.

Drenaje agrícola subterráneo Funcionamiento hidráulico Método del elemento finito Zonas áridas CIENCIAS AGROPECUARIAS Y BIOTECNOLOGÍA